You can judge for yourself how Efron looks as a lady in this "Tonight Show" selfie.

Rogen also talked to Fallon about appearing on the first episode of Fallon's "Tonight Show." The actor appeared in a gag in which a series of celebrities such as Stephen Colbert, Lady Gaga, Kim Kardashian, and Mike Tyson came out and gave the late-night host a hundred-dollar bill for betting that he would never have a tenure as host of the talk show.

"I think every famous person ever, and me came out," Rogen joked. "I literally flew out to do a four second joke on television, thats how cool I thought it would be here on the first show."

He said that he had a wonderful 20-minute conversation with an unlikely assortment of stars: Lindsay Lohan, Sarah Jessica Parker and Joe Nameth.

"I was truly bizarre, at first I was thinking 'wow Lindsay Lohan's dad is so nice. He dresses crazy'," Rogen joked.

Then, Fallon talked about James Franco who caused a stir with a photo he posted on his Instagram account of a painting he created of Rogen without any clothes, entitled "Seth at Rest."

When asked why Franco would create such a work, Seth said: "I saw him the other day and I didn't ask him because I was afraid of what the answer might be, I avoided talking to him about it. It's a little bizarre but a little complimentary."

In retaliation, Rogen created a nude charcoal pencil drawing of Franco on the show.

Finally, Rogen talked about his new comedy "Neighbors," explaining the film's mix of emotional moments and crude humor.

"We found that lots of our jokes revolve around genitalia and in order to balance that out we have to have emotion in the movie or else it gets way too skewed towards the genitalia side," Rogen said. "So for every 400 genitalia jokes we needed one emotional moment. So this movie has like 8 emotional moments in it."

He also commended Efron for his performance, saying that "It's amazing someone as handsome as Zac can make you feel sympathy for him."

Watch the men appear in dragalicious sketch above. You can also watch Rogen sketch a nude portrait of Franco below.

Published at 7:42 AM CDT on May 7, 2014 | Updated at 11:52 AM CDT on May 7, 2014